US 11,837,740 B2
Power storage device
Kyosuke Miyoshi, Saitama (JP); and Shoshi Hidaka, Saitama (JP)
Assigned to HONDA MOTOR CO., LTD., Tokyo (JP)
Filed by HONDA MOTOR CO., LTD., Tokyo (JP)
Filed on Dec. 16, 2020, as Appl. No. 17/123,136.
Claims priority of application No. 2019-231624 (JP), filed on Dec. 23, 2019.
Prior Publication US 2021/0194085 A1, Jun. 24, 2021
Int. Cl. H01M 50/209 (2021.01); H01M 50/244 (2021.01); H01M 50/249 (2021.01); H01M 10/04 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 50/209 (2021.01) [H01M 10/0481 (2013.01); H01M 10/0525 (2013.01); H01M 50/244 (2021.01); H01M 50/249 (2021.01); H01M 2220/20 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A power storage device comprising:
a cell group in which a plurality of battery cells each having a terminal on a first surface are stacked;
a cylindrical housing part that houses the cell group and includes an upper wall portion, a lower wall portion, and two side wall portions that respectively cover the first surface, a surface opposite to the first surface, and a side surface adjacent to the first surface of a respective one of the battery cells in the cell group;
a first plate member extending from the first surface of each of the battery cells in the cell group to side surfaces of each of the battery cells, the side surfaces being adjacent to the first surface, the first plate member being housed in the housing part together with the cell group;
a cell side protrusion portion protruding from a portion extending on each of the side surfaces of each of the battery cells toward an inner wall surface of the housing part in the first plate member;
an insertion member that has a bar-shaped body having a length extending an entire length of the cell group in a length direction, and is press-fitted from an opening that is open at an end of the housing part to contact both of the cell side protrusion portion and the inner wall surface disposed closer to the first surface side than the cell side protrusion portion;
wherein the cell side protrusion portion has a receiving surface arranged to face the upper wall portion side and the outward in the width direction of the cell group and receives a pressing force from the insertion member; and
wherein the insertion member presses the cell group in a diagonal direction of the battery cells against a contact point with the receiving surface via the receiving surface of the cell side protrusion portion.